The Polyfill incident is bad (that seems to be how the hackers got into the internet archive), and the OpenSSH one could have been really nasty, if it wasn't caught both early, and by chance (a performance engineer at a major software company noticed).
It's simple, when you understand how shaky the foundation of all digital infrastructure is it's impossible to not be paranoid.
Relevant XKCD.
The Polyfill incident is bad (that seems to be how the hackers got into the internet archive), and the OpenSSH one could have been really nasty, if it wasn't caught both early, and by chance (a performance engineer at a major software company noticed).
I'd say this comic is more relevant: